Back Light - Samsung SGH-T619 Service Manual

Flow Chart of Troubleshooting
9-9. Back Light (for LCD)
Backlight does not work
Is LCD Contrast set on high
level in the Menu?
HDC700(Pin43) = H ?
Check the VBAT pins of
Pin 38, 40, 42 = 3.8V?
Replace the LCD Module
Yes
Yes
Yes
HDC700.
Yes
Yes
END
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No
Set LCD Contrast on high level
No
Check the UCP200
No
Check the related circuit of VBAT.
9-16